JPS6341101A - Small-diameter wood sawing board and manufacture thereof - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a small-diameter sawn board and a method for manufacturing the same, and in particular,
This invention relates to a small-diameter wood log having a thickness of 2 to 4 mm and a method for manufacturing the same.

(Prior Art) Conventionally, thin sawn boards used for plywood and the like have been manufactured using a row recess, a slicer, or the like.

(Problem to be solved by the invention) However, in a manufacturing method using such a machine,
For example, when using small-diameter wood such as thinned wood as a material, it has many knots, which creates resistance to the cutting blade and causes damage to the cutting blade, or makes it impossible to cut the knots. It was difficult to cut within the range. Furthermore, even if cutting is possible, in conventional machines, the workpiece is held by a clamp, for example, and the workpiece near the clamp is held by this clamp, so cutting cannot be performed, so the material cannot be cut. There were many losses. Moreover,
The resulting sawn board had a problem in that it could not be used as a sawn board because of cracks caused by knots.

Therefore, the main object of the present invention is to provide a small-diameter wood plank that can be made into a sawn board with a thickness of 2 to 4 mm even if small-diameter wood with many knots is used, and a method for manufacturing the same.

(Means for Solving the Problems) The first invention is a small-diameter sawn board formed from small-diameter wood and having a thickness in the range of 2 to 4 fins.

The second invention is a method for producing a small-diameter sawn board, which includes the steps of forming a workpiece from small-diameter wood, and cutting the workpiece while holding it under suction to form a small-diameter sawn board.

(Function) Since the workpiece is held by suction, there are no parts that cannot be cut, and material loss is reduced.

Also, the workpiece does not swing in a direction transverse to its cutting surface and does not come into contact with the cutting blade. Therefore, the resistance applied to the cutting blade can be reduced.

(Effects of the Invention) According to the first invention, a novel small-diameter sawn board with a thickness of 2 to 4 cranes can be obtained by using small-diameter wood with many knots that could not be used in the past. This makes it possible to reduce manufacturing costs and open up new uses for thinned wood, which currently has little utility.

According to the second invention, the novel small-diameter sawn wood board as described above can be efficiently manufactured.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

(Embodiment) FIG. 1 is a perspective view showing an embodiment of the present invention. This small-diameter sawn wood board 10 includes five rectangular sawn boards 12, and is formed into a planar square shape with one side of 21.5 am, for example. The sawn boards 12 each have a thickness of 3 mm, and are made of small-diameter wood such as thinned wood, so they include a large number of knots 14. An adhesive layer 16 is formed between the side surfaces of the ground boards 12 arranged in parallel in this way, and these five ground boards 12 are connected continuously in the width direction by this adhesive layer 16. It constitutes a small-diameter sawn wood board 10 made of a single board.

Next, a method for manufacturing this small-diameter sawn wood board 10 will be explained in detail.

First, 18 logs of small-diameter wood, such as thinned cedar and cypress wood, are used.
Prepare a square timber 20a and cut it from the direction perpendicular to the annual rings.
and 20b. At this time, in order to reduce material loss, the square timbers 20a and 20b are formed to have dimensions that minimize wood loss as much as possible, depending on the diameter of the log 18.

Many square pieces 20a and 20 formed in this way
Among the items b, those having approximately the same width are selected. A urethane resin adhesive, for example, is applied to the side surfaces of the rectangular pieces of equal width selected in this way to form an adhesive layer 16.

Workpiece A is then created by gluing these square pieces in parallel.

This workpiece A is attached to, for example, a thinning machine 22, and the small-diameter sawn board 10 is cut by cutting the square timbers to a thickness of, for example, 3 mm from the direction in which the timbers are arranged in parallel (the direction indicated by the arrow in FIG. 2). Form.

Note that it is also possible to use one square timber formed from the log 18 as it is as the workpiece A without gluing it, and use the obtained sawn board 12 as a small-diameter wood temporary.

When cutting such a workpiece A, a conventional rotary endless dress or slicer cannot be used, and a special thinning machine 22 must be used. Therefore, the structure of this thinning machine 22 will be described in detail below.

3A to 3D show a special thinning machine 22 used for manufacturing the small-diameter sawn board 10, FIG. 3A is a perspective view thereof, FIG. 3B is a perspective view of the main part thereof, and FIG. Figure 3C is a side view thereof, and Figure 3D is a front view of the main parts thereof.

First, the overall configuration of this thinning machine 22 will be explained.

This thinning machine 22 includes a base 23 that is long in the front and rear.

The base 23 is provided with rails 24a and 24b, respectively, on both sides parallel to its elongated direction. On these two rails 24a and 24b, a frame 25 constituting a part of the mounting means is mounted on these rails 24a and 24b by a large number of rollers (not shown) provided at the lower part of the frame 25.
It is placed so that it can move back and forth on b.

The frame 25 includes a rectangular parallelepiped-shaped main member 26. Support members 27 and 28 are fixed to the front and rear lower portions of the main member 26, and the above-mentioned rollers (not shown) are fixed to the lower portions of the support members 27 and 28. ) is rotatably attached. Therefore, this frame 25 and the like can be moved back and forth.

Furthermore, table members 30 and 31 are fixed to the main member 26 of the frame 25 at intervals in the front and rear. The table members 30 and 31 are for placing the workpiece A thereon.

Further, a frame member 3 is provided at the front and rear left ends of the main member 26 of the frame body 25.
2 and 34 are fixed on the support members 27 and 28, respectively, so as to protrude to the left side of the main member 26.

On the other hand, a hollow square columnar abutment member 34, which constitutes a part of the plate material suction and holding means, is provided on the frame members 32 and 33 of the frame body 25 so as to be displaceable in the left-right direction. This contact member 3
4 is for determining the position of the workpiece A in the left-right direction by bringing the left side surface of the workpiece A on the table members 30 and 31 into contact with the right side surface thereof. That is, as shown in FIG. 3B, at the lower part of the front and rear ends of the abutment member 34, a suitable member 35 extends from there to the right side.
and 36 are fixed, grooves 38 and 40 are formed in the upper ends of the frame members 32 and 33, extending left and right, and suitable members 35 and 36 are inserted into the grooves 38 and 40, respectively. There is.

Therefore, the contact member 34 can be displaced in the left-right direction with respect to the frame members 32 and 33, that is, the table members 30 and 31.

Further, screw holes 34a and 36a are formed in these convex members 35 and 36, and screw holes 34a and 36a are formed in these convex members 35 and 36.
Bolts 42 and 44, which are rotatably provided at the right ends of the frame members 32 and 33, are screwed into a and 36a. Therefore, rotate bolts 42- and 44 clockwise 1
By turning counterclockwise, the abutting member 34 can be displaced in the left-right direction.

In addition, a piece member (not shown) is formed in the frame members 32 and 33 on the left side of the grooves 38 and 40. Thick members 46 and 48 are inserted into the grooves 38 and 40 of the frame members 32 and 33, respectively, so as to contact the piece members.

The thick members 46 and 48 are similar to the convex members 35 and 3.
6, this is to facilitate positioning of the abutment member 34 in the left-right direction, and by displacing the convex members 35 and 36 to the left, the left end surfaces of the convex members 35 and 36 align with the thick member. 46 and 48. As a result, the convex members 35 and 36, that is, the abutting member 34, are positioned at predetermined positions in the left-right direction. Note that if the thick members 46 and 48 are replaced with thick members of other thicknesses, the positions of the convex members 35 and 36, that is, the abutment member 34 in the left and right direction can be arbitrarily changed and the positions can be easily determined. be able to. As a result, from the positive side of the saw, the right side of the aluminum surface plate fixed to the abutment member 34 (suction hole 5
0) can be set. That is, by this,
The finished thickness of the drawn board can be set. Also, the thickness member 3
5 and 36, to facilitate their insertion into and removal from grooves 38 and 40.
A knob bar is formed extending upward from the top.

Furthermore, a suction hole 50 is formed in the center of the right side of the abutting member 34. The suction holes 5o are formed in a comb-teeth shape with a width of, for example, 2 to 2.3 squares, and spaced apart from each other by, for example, 5 squares. Further, a circular hole 52 is formed in the rear end surface of the contact member 34, and a suction device (not shown) such as a blower device or a vacuum pump is connected to this circular hole 52 via a hose 54. Ru. Therefore, by operating the suction device, suction force can be generated in the suction hole 50 of the contact member 34. This suction force attracts the left side of the workpiece A on the table members 3o and 31, and therefore the workpiece A is moved to the contact member 34.
is held by suction.

On the other hand, a contact member 3 is placed on the table members 30 and 31.
A hollow quadrangular prism-shaped abutment member 60, which constitutes a part of the workpiece suction and holding means, is provided so as to face the workpiece suction holding means.

In this case, grooves 62 and 64 are formed on the upper surfaces of the table members 30 and 31 to extend left and right, and the abutment members 6
Convex portions 66 and 68 that can be fitted into the grooves 62 and 64 are formed at the front and rear lower portions of 0, and these convex portions 66 and 68 are fitted into the grooves 62 and 64, respectively. Therefore, this contact member 60 can be displaced in the left-right direction.

Furthermore, as shown in FIGS. 3A and 3B, a cylinder 70 for displacing this contact member 60 in the left-right direction
However, with the rod 70a facing the right side, the table member 3
0 and 31, and is fixed on the main member 26 of the frame body 25. The tip of the Ron door 0a of this cylinder 70 is fixed to a piece member 72 that protrudes rightward from the right side of the abutting member 60. Therefore, the Rondore Q of the cylinder 70
When a is expanded or contracted, the abutting member 60 is displaced in the left-right direction. In this case, if the loft 7°a of the cylinder 700 is shortened, the abutting member 60 is displaced to the left, and the left side of the abutting member 60 touches the workpiece A on the table members 30 and 31.
is in contact with the right side of the

Therefore, the workpiece A on the table members 30 and 31 is held between the abutting members 34 and 6o.

Further, the abutting member 60 includes a suction hole 50 of the abutting member 34.
A comb-shaped suction hole 7 similar to the suction hole 50 is provided on the surface facing the suction hole 50.
4 is formed, and a circular hole 76 is formed on the rear right side surface.
A suction device (
(not shown) are connected.

Therefore, the left and right sides of the workpiece A on the table members 30 and 31 are suctioned by the contact members 34 and 60, and the workpiece A is held by suction.

Next, the fixing means for fixing the contact member 60 to the table members 30 and 31 of the frame body 25 will be explained. The fixing means includes two cylinders 80 and 82, and one cylinder 80 and its related components will be described in detail with particular reference to FIGS. 4A and 4B.

The cylinder member 80 is attached to the abutting member 6 by a mounting piece 84.
It is fixed to the abutment member 6° downward at the front right side of the 0.

The rod 80a of this cylinder 80 is rotatably attached to one end of an arm member 88 via a connecting member 86, particularly as shown in FIG. 4A. The other end of this arm member 88 is rotatably attached to a support member 9o extending downward from the abutment member 60. Furthermore, a bar member 92 is formed extending upward from the center of the arm member 88.

This rod member 92 is a bearing 9 provided at the lower part of the abutting member 60.
4 is inserted. Therefore, rod 8 of cylinder 80
When 0a is extended or contracted, the arm member 88 is swung up and down using the other end as a fulcrum, and the rod member 92 is further displaced up and down.

Further, as shown in FIGS. 3A and 3B, an auxiliary table member 9 is spaced rearward from the table member 30.
6 is mounted on the main member 26 of the frame 25. The above-mentioned rod member 92 is arranged between the table member 30 and the auxiliary table member 96, as shown in FIG. 4B.

Further, a support plate 98 is inserted through the rod member 92, and this support plate 98 is fixed to the lower part of the rod member 92. A lining member 99 is formed on the side of the upper surface of this support plate 98 . This lining member 99 is formed so as to face the collar members 30a and 96a of the table member 30 and the auxiliary table member 96, particularly as shown in FIG. 4B.

Further, the lining member 99 is formed of a relatively non-slip material such as an inorganic lining or an organic lining.

Therefore, if the rod 80a of the cylinder 80 is contracted,
The lining member 99 is brought into contact with the top members 30a and 96a of the table member 30 and the auxiliary table member 96, whereby the lining member 99, that is, the contact member 60 can be fixed to the table member 30 or the like.

Note that the other cylinder 82 is fixed to the abutment member 60 downwardly at the rear right side of the abutment member 60 by an attachment piece 85 . In connection with this cylinder 82, the above-mentioned connecting member 86. Arm member 88, support member 90. Rod member 92. Related components similar to those of bearings 94 and auxiliary table members 96 are provided. Therefore, the abutment member 60 can be fixed to the table member 31 or the like by contracting the rod 82a of the cylinder 82. That is, the cylinder door 0a of the cylinder 70
By contracting the workpiece A, the abutting member 34
and 60, and held under suction by a suction machine.

Then, with the rods 80a and 82a of the cylinders 80 and 82 retracted and the abutment member 60 fixed to the table members 30 and 31, the auxiliary table member 96, etc., the workpiece A is stabilized by being cut. It is possible to perform precise cutting.

Next, the main components of this thinning machine 22 are:
The preceding groove forming means for forming the preceding groove on the workpiece A and the cutting means for cutting the same will be explained.

The advance groove forming means includes two motors 100a and 102.
a, these motors 100a and 102a are
It is attached to a support 104a provided at the upper left of the center of the base 23. In this case, motors 100a and 102a are
The supports 10 are arranged one above the other, with their axes directed to the left.
4a.

A rotatably provided shaft 106a is provided at the bottom of this support 104a, and a shaft 10 is rotatably provided directly above the shaft 106a.
There is 8a. For example, plate-shaped circular saw teeth 109a and 109b are fixed to the right ends of these shafts 106a and 108a, respectively, as grooving blades.

These circular sawteeth 109a and 109b are connected to the abutting member 34.
and the table members 30 and 31, and is arranged so that its main surface is parallel to the right side surface of the abutting member 34. Further, the circular saw teeth 109a and 109b are
As shown in Figure 5, the blades are located on the same plane, have the same thickness and diameter, are above and below the workpiece A, and their cutting edges are spaced approximately half the thickness of the workpiece A. They are placed apart.

On the other hand, the cutting means includes two motors 100b and 102.
b, and these are attached to a support 104b provided at the upper right center of the base 23. In this case, motor 100b
and 102b are fixed to the support body 104b, with their axes directed to the left side, and arranged one above the other. This support 10
4b, a rotatably provided shaft 106b,
Directly above it is a rotatably provided shaft 108b.

The right ends of these shafts 106b and 108b have circular saw teeth 110 and 112 located rearwardly on the same plane as the front-back plane passing through the center points of circular saw teeth 109a and 109b, respectively. And circular sawtooth 110
is located parallel to and behind the shaft 106a, and is fixed to a rotatably provided shaft 106b. Further, the circular sawtooth 112 is located parallel to and behind the shaft 108a, and is fixed to a rotatably provided shaft 108b. The circular saw teeth 110 and 112 have the same thickness and diameter, and as shown in FIG. 5, the upper end of the lower circular saw tooth 110 is positioned slightly above the lower end of the upper circular saw tooth 112. , placed. For this purpose, workpiece A is first formed with a leading groove using circular saw teeth 109a and 109b,
Cutting will be performed along this leading groove with circular saw teeth 110 and 112. These circular saw teeth 109a, 109b.

110 and 112 have a thickness of, for example, 0°5 to 2
．． 8 cranes, but circular saw teeth 109a and 10
The thickness of the circular saw teeth 110 and 112 is less than the thickness of the circular saw teeth 110 and 112. Further, the saw teeth of the circular saw teeth 110 and 112 may be finer than those of the circular saw teeth 109a and 109b. Therefore, the leading groove is the circular sawtooth 11
The thickness is the same as or slightly smaller than that of 0 and 112.

Therefore, the circular saw teeth 110 and 112 do not bend in the direction crossing the cutting direction (they are guided in the cutting direction,
Moreover, since the workpiece A is cut with fine circular saw teeth, the cut surface of the workpiece A becomes smooth.

On the other hand, pulleys 1 are mounted on the shafts of motors 100a and 102a.
14a and 116b are fixed, and the shaft 106a
A pulley (not shown) is fixed to the left end of the shaft 114a and the shaft 106a.
A bell l-1202 is attached to the pulley (not shown) of Boo'J 116a and a bell 122a is attached to the pulley (not shown) of Boo'J 116a and 108a. Similarly, pulleys 114b and 116b are fixed to the shafts of motors 100b and 102b, and
Pulleys (not shown) are fixed to the left ends of the shafts 106b and 108b, and a heald 120 is attached to the pulley 114b and the pulley (not shown) of the shaft 106b.
b is applied, and also pulley 116b and shaft 108b
A belt 122b is also applied to a pulley (not shown). Therefore, when the motors 100a and 102a are operated, their rotation is caused by the rotation of the motors 120a and 122a.
a through the shafts 106a, 108a, the circular sawtooth 10
9a and 109b, causing them to rotate.

Similarly, when motors 100b and 102b are activated, their rotation is transmitted by bells 120b and 122b to circular saw teeth 110 and 112 through shafts 106b and 108b, causing them to rotate. Note that this rotation direction is set to be opposite to the moving direction of the workpiece A, which is a so-called amplifier cut. For this reason, chips generated by cutting tend to come out to the outside.

Next, in this state, the frame 25 and the like are displaced backward or forward to cause the workpiece A on the table members 30 and 31 to cross the circular saw teeth 109a and 109b, and subsequently to cross the circular saw teeth 110 and 112. . Then, a leading groove is first formed in the workpiece A by the circular saw teeth 109a and 109b, and the workpiece A is cut along this leading groove by the circular saw teeth 110 and 112 to form a thin sawn board.

In addition, as shown in FIG. 3D, these circular saw teeth 109a
, 109b, 110 and 112 are covered with covers 109c and 109d.

110a and 112a are provided, and hoses 124a, 124b, 126a and 126b are provided to communicate the inside of these covers with a suction machine (not shown). Therefore, circular saw teeth 109a and 109b
Chips generated when forming the leading groove with the circular saw blades 110 and 112 and when cutting the workpiece A with the circular saw teeth 110 and 112 are sucked and removed by a suction machine.

Next, the displacement means for displacing the frame 25 and the like back and forth as described above will be explained.

This displacement means includes a motor 130 fixed to the front upper part of the base 23. A gear 132 is attached to the shaft of this motor 130.
is fixed. Chain 1 is attached to this gear 132.
Multiplyed by 34. One end of the chain 134 is fixed to the front part of the support member 27 of the frame body 25, and the rear part of the chain 134 is attached to a gear 136 rotatably provided at the rear part of the base 23, as shown in FIG. 3C. The other end is fixed to the rear part of the support member 28 of the frame body 25. Therefore, if the motor 130 is rotated forward or backward, the chain 13
4, the frame body 25 and the like are pulled forward or backward and displaced forward or backward.

By displacing the frame 25 and the like back and forth in this manner, the circular saw teeth 110 and 112 of the cutting means can be caused to cross the workpiece A on the table members 30 and 31, as described above. Thereby, the workpiece A can be cut to form thin sawn boards.

Next, an example of use of the thinning machine 22 of this embodiment will be explained.

First, the right side of the contact member 34 and the circular saw teeth 109a, 109
The distance between b, 110 and 112 from the left side surface is adjusted to the thickness of the sawn board to be formed, for example, 2 to 4H. In this case, this is done by adjusting the ports 42 and 44 in FIG. 3B and displacing the abutting member 34 from side to side.

Note that when performing this adjustment, if the thick members 46 and 48 of a predetermined thickness are inserted into the grooves 38 and 40 of the frame members 32 and 33 in advance, the convex members 35 and 36 of the abutting member 34 It is only necessary to displace the abutment member 34 to the left until it abuts against the thick members 46 and 48, and therefore, the adjustment can be easily performed. That is,
The thinner the thickness members 46 and 48, the thicker the sawn board, and the thicker the thickness members 46 and 48, the thinner the sawn board.

Also, circular saw teeth 109a, 109b, 110 and 112
can be finely adjusted left and right using male and female threads.
This results in 109a, 109b, 110 and 112
The thickness centers of the circular saw teeth are fixed so that they are located on the same plane.

Further, the interval between the upper and lower tooth tips of the circular saw teeth 109a and 109b is set to approximately half the thickness of the workpiece A.

Next, workpiece A is placed on table members 30 and 31.

Then, the round door 0a of the cylinder 70 is retracted, the abutment member 60 is displaced to the left, and the workpiece A is positioned with it being sandwiched between the abutment members 34 and 60. In this case, suction force is generated in the suction holes 50 and 74 of the contact members 34 and 60, and the workpiece A is held by the contact members 34 and 60 under suction.

Furthermore, by retracting the rods 80a and 82a of the cylinders 80 and 82, the abutment member 60 is fixed to the table member 30.31 and the auxiliary table member 96. In this way, the reason why the abutting member 60 is fixed to the table members 30 and 31 fixed to the frame 25 and the auxiliary table member 96 is that when the workpiece A is cut, the abutting member 60 and the workpiece A is displaced to the left by the cylinder 70, and the cut surface of the workpiece A and the circular sawtooth 1
This is to prevent the contact resistance with the main surfaces of 10 and 112 from becoming unintentionally large.

Next, the motors 1ooa and 100b of the cutting means.

102a and 102b are activated, circular saw teeth 109a,
109b, 110 and 112 are rotated.

Then, the motor 130 of the displacement means is rotated, and the frame 25
etc. are displaced from the state shown by the solid line in FIG. 3C, that is, from the front to the state shown by the dashed line in FIG. , for example, to form a sawn board with a thickness of 2 to 4 mm.

After the frame 25 and the like are displaced rearward to form the cutting board, the contact piece 140 of the support member 28 comes into contact with the rear rimming switch 142, as shown by the one-dot chain line in FIG. 3C. , the motor 130 of the displacement means and the suction machine of the suction hole 50 are stopped, and the plate material that has been suctioned and held by the abutment member 34 is released (dropped). At this time, the motor 1 of the cutting means
00b, 102b and the motor 100 of the preceding groove forming means
a, 102a continues to rotate. In addition, the suction hole 74
The suction machine remains in operation, and the workpiece A has suction hole 7.
4 is in a state of adsorption.

Then, by extending the rods 80a and 82a of the cylinders 80 and 82, the abutment member 60 is released from the table member 30.31 and the auxiliary table member 96, and by extending the rond door 0a of the cylinder 70, the workpiece A is released. Abutment member 6 held under suction
0 is displaced to the right along with workpiece A. In this way, displacing workpiece A etc. to the right is as follows:
In the next step, frame 25. When returning workpiece A etc. to the front, workpiece A is
This is to prevent careless contact with 10 and 112.

Next, the motor 130 of the displacement means is rotated in the opposite direction, and the frame 25 is
etc., and return it to its original state by displacing it forward.

In this state, as shown by the solid line in FIG. 3C, the support member 2
The contact piece 144 of the frame 25.7 contacts the front limit switch 146, and the motor 130 is stopped. Workpiece A etc. are stopped.

Furthermore, in order to cut the remaining workpiece A to form a sawn board, the workpiece A is positioned so as to be sandwiched between the contact members 34 and 60 (the suction machine of the suction hole 50, the suction machine of the suction hole 74). The steps after the above-mentioned step (which works together with the suction machine) may be repeated in order.

In this example, a plurality of square timbers 20a and 20b with different widths were formed from one log 18, but as shown in FIG.
0c is formed, a plurality of square pieces 20c are glued together to form a workpiece A, and this is cut to form a small diameter wood sawn board 1.
0 may also be formed.

Alternatively, a square piece of wood may be used as the workpiece A without being glued, and the sawn board 12 obtained by cutting this may be used as a small-diameter sawn board.

The small-diameter wood boards formed in this way have a thin thickness of 2 to 41 mm, so chemicals can easily penetrate, and they can be used as insect repellents.
Fire prevention or antiseptic treatment can be easily performed.

Further, the small-diameter sawn wood board 10 of this embodiment may be used as is, or may be used as a plywood board made by laminating a plurality of sheets with the wood grains oriented in parallel, or a plurality of sheets with the wood grains oriented at right angles. It may also be used as plywood made by laminating sheets.

In addition, in this embodiment, the small diameter wood sawn board 10 has a side of 21.
Although the shape is 5 cm square, it goes without saying that this may be changed arbitrarily depending on the diameter of the raw wood and the purpose of use.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 2 is an illustrative diagram showing the manufacturing process of this embodiment. FIGS. 3A to 3D show an embodiment of the present invention,
FIG. 3A is a perspective view thereof, FIG. 3B is a perspective view of the main part, FIG. 3C is a side view thereof, and FIG. 3D is a front view of the main part. 4A and 4B show the fixing means of the embodiment shown in FIGS. 3A to 3D, with FIG. 4A being a diagrammatic view of the same as seen from the front, and FIG. 4B being a schematic view of it as seen from the right. This is an illustrative diagram. FIG. 5 is an illustrative view showing the rotational direction of the circular saw tooth of the embodiment shown in FIGS. 3A to 3D and the positional relationship between the circular saw tooth and the workpiece. FIG. 6 is an illustrative view showing a manufacturing method of another embodiment. In the figure, 10 is a small-diameter sawn board, 12 is a sawn board, and 20
a, 20b and 20c are square timbers, 22 is a thinning machine,
23 is a base, 24a and 24b are rails, 25 is a frame, 30 and 31 are table members, 34 and 60 are contact members, 70.80 and 82 are cylinders, 70a, a
oa and 82a are rods, 72 is a piece member, 100a,
100b, 102a, 102b and 130 are motors;
109a, 109b, 110 and 112 are circular saw teeth, 1
32 and 136 are gears, and 134 is a chain.

Claims (1)

[Scope of Claims] 1. A small-diameter sawn board formed from small-diameter wood and having a thickness in the range of 2 to 4 mm. 2. The small-diameter sawn board according to claim 1, wherein the small-diameter sawn board has a side surface bonded to a side surface of another small-diameter sawn board to form a single plate. 3. The small-diameter sawn board according to claim 1 or 2, wherein a plurality of small-diameter sawn boards are laminated with the wood grains oriented in parallel. 4. The small-diameter sawn board according to any one of claims 1 to 3, wherein a plurality of small-diameter sawn boards are laminated with their grains perpendicular to each other. 5. A method for manufacturing a small-diameter sawn board, comprising the steps of forming a workpiece from small-diameter wood, and cutting the workpiece while holding it under suction to form a small-diameter sawn board. 6. The step of forming a workpiece from the small-diameter wood further includes: forming a square lumber from the small-diameter wood, selecting square lumber with approximately the same width from the square lumber, and applying adhesive to the side surface of the selected square lumber. and a step of adhering the square pieces coated with the adhesive in parallel to create a workpiece.
A method for producing small diameter sawn wood boards as described in Section 1. 7 The step of cutting the workpiece while holding it under suction to form a small-diameter sawn board further includes the step of forming a leading groove in the workpiece, and cutting the workpiece along the leading groove formed in the workpiece. A method for manufacturing a small diameter sawn board according to claim 5 or 6, which includes the step of cutting the pieces to form a small diameter sawn board.